{
  "id": "2012.14636",
  "version": "v1",
  "published": "2020-12-29T07:19:35.000Z",
  "updated": "2020-12-29T07:19:35.000Z",
  "title": "Controlling Synthetic Spin-Orbit Coupling in a Silicon Quantum Dot using Magnetic Field Direction",
  "authors": [
    "Xin Zhang",
    "Yuan Zhou",
    "Rui-Zi Hu",
    "Rong-Long Ma",
    "Ming Ni",
    "Ke Wang",
    "Gang Luo",
    "Gang Cao",
    "Gui-Lei Wang",
    "Peihao Huang",
    "Xuedong Hu",
    "Hong-Wen Jiang",
    "Hai-Ou Li",
    "Guang-Can Guo",
    "Guo-Ping Guo"
  ],
  "comment": "13 pages, 4 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Tunable synthetic spin-orbit coupling (s-SOC) is one of the key challenges in various quantum systems, such as ultracold atomic gases, topological superconductors, and semiconductor quantum dots. Here we experimentally demonstrate controlling the s-SOC by investigating the anisotropy of spin-valley resonance in a silicon quantum dot. As we rotate the applied magnetic field in-plane, we find a striking nonsinusoidal behavior of resonance amplitude that distinguishes s-SOC from the intrinsic spin-orbit coupling (i-SOC), and associate this behavior with the previously overlooked in-plane transverse magnetic field gradient. Moreover, by theoretically analyzing the experimentally measured s-SOC field, we predict the quality factor of the spin qubit could be optimized if the orientation of the in-plane magnetic field is rotated away from the traditional working point.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-12-29T07:19:35.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "silicon quantum dot",
      "controlling synthetic spin-orbit coupling",
      "magnetic field direction",
      "in-plane transverse magnetic field gradient"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}